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Dione (moon)

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653: 3571: 867: 1111: 56: 4717: 990: 4643: 1066: 2391: 1162: 5007: 3565: 5031: 1188:. There was a close targeted flyby at a distance of 500 km (310 mi) on 11 October 2005; another flyby was performed on 7 April 2010, also at a distance of 500 km. A third flyby was performed on 12 December 2011 at a distance of 99 km (62 mi). The following flyby was on 16 June 2015 at a distance of 516 km (321 mi), and the last 3577: 4983: 1087:
kilometer crater could have spun the satellite. Because there are many craters larger than 35 kilometres (22 mi), Dione could have been repeatedly spun during its early heavy bombardment. The pattern of cratering since then and the bright albedo of the leading side suggests that Dione has remained in its current orientation for several billion years.
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of Enceladus. The ridge Janiculum Dorsa has a height of 1 to 2 km (0.6 to 1.2 miles); Dione's crust seems to pucker 0.5 km (0.3 miles) under it, suggesting that the icy crust was warm when the ridge formed, probably due to the presence of a subsurface liquid ocean, which increases tidal flexing.
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had provided scientists with evidence that Dione is more active than previously realized. Using topographic data, NASA teams deduced that crustal depression associated with a prominent mountain ridge on the leading hemisphere is best explained if there was a global subsurface liquid ocean like that
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kilometres (19 mi) in diameter. Some of the plains are more heavily cratered than others. Much of the heavily cratered terrain is located on the trailing hemisphere, with the less cratered plains areas present on the leading hemisphere. This is the opposite of what some scientists expected;
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Dione's icy surface includes heavily cratered terrain, moderately cratered plains, lightly cratered plains, and areas of tectonic fractures. The heavily cratered terrain has numerous craters greater than 100 kilometres (62 mi) in diameter. The plains areas tend to have craters less than 30
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resurfaced much of its surface, with the streaks forming from eruptions along cracks in the Dionean surface that fell back as snow or ash. Later, after the internal activity and resurfacing ceased, cratering continued primarily on the leading hemisphere and wiped out the streak patterns there.
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satellite with the highest cratering rates on the leading hemisphere and the lowest on the trailing hemisphere. This suggests that during the period of heavy bombardment, Dione was tidally locked to Saturn in the opposite orientation. Because Dione is relatively small, an impact causing a 35
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flyby of 13 December 2004, which produced close-up images. These revealed that the 'wisps' were, in fact, not ice deposits at all, but rather bright ice cliffs created by tectonic fractures (chasmata). Dione has been revealed as a world riven by enormous fractures on its trailing hemisphere.
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in the Solar System, and is more massive than all known moons smaller than itself combined. It is also Saturn's fourth-largest moon. Based on its density, Dione’s interior is likely a combination of silicate rock and water ice in nearly equal parts by mass.
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probe instruments were unable to directly detect water from the exosphere due to high background levels, but it seems that highly charged particles from the planet's powerful radiation belts could split the water in the ice into hydrogen and oxygen.
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Dione features linear 'virgae' that are up to hundreds of km long but less than 5 km wide. These lines run parallel to the equator and are only apparent at lower latitudes (at less than 45° north or south); similar features are noted on
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Wispy terrain on Dione's trailing hemisphere. The Eurotas (top) and Palatine Chasmata run from upper right to lower left; the Padua Chasmata are near vertical at right, and the Carthage Fossae horizontal at left. The crater Cassandra and its
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space probe photographed Dione in 1980, it showed what appeared to be wispy features covering its trailing hemisphere. The origin of these features was mysterious, because all that was known was that the material has a high
4172: 1053:. They are brighter than everything around them and appear to overlay other features such as ridges and craters, indicating they are relatively young. It has been proposed that these lines are of 935:. Dione's leading hemisphere is heavily cratered and is uniformly bright. Its trailing hemisphere, however, contains an unusual and distinctive surface feature: a network of bright ice cliffs. 1114:
Four Saturn's moons: Titan, in the background; Dione, above the rings; Pandora, beyond the rings on the right of the image; and Pan in the Encke Gap of the A ring on the left of the image.
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origin, as the result of the emplacement of material across the surface by low‐velocity impacts of material sourced from Saturn's rings, co‐orbital moons, or closely approaching comets.
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and is thin enough that it does not obscure the surface features underneath. One hypothesis was that shortly after its formation Dione was geologically active, and some process such as
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Fractures bisecting older craters on Dione. Those running from upper right to lower left are the Carthage Fossae, whereas Pactolus Catena runs more horizontally at lower right.
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Beuthe, M.l; Rivoldini, A.; Trinh, A. (28 September 2016). "Enceladus' and Dione's floating ice shells supported by minimum stress isostasy".
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O, mainly in the form of water ice, but with some models suggesting that the lowermost part of this layer could be in the form of an
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Zannoni, M.; Hemingway, D. J.; Gomez Casajus, L.; Tortora, P. (15 July 2020). "The gravity field and interior structure of Dione".
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Roatsch, T.; Jaumann, R.; Stephan, K.; Thomas, P. C. (2009). "Cartographic Mapping of the Icy Satellites Using ISS and VIMS Data".
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spacecraft made multiple flybys of Dione throughout the 2000s and 2010s as part of its campaign to explore the Saturn system.
1821: 215: 1625:; Helfenstein, P.; Thomas, P. C.; Ingersoll, A. P.; Wisdom, J.; West, R.; Neukum, G.; Denk, T.; Wagner, R. (10 March 2006). 2219: 3439: 2542: 4973: 1936:; Nimmo, F.; Kattenhorn, S. A. (March 2013). "Flexure on Dione: Investigating subsurface structure and thermal history". 3570: 1408:"The Orbits of the Main Saturnian Satellites, the Saturnian System Gravity Field, and the Orientation of Saturn's Pole*" 2521: 2415: 4948: 2046: 2478: 2467: 2285:
Testing Candidate Driving Forces for Faulting on Dione: Implications for Nonsynchronous Rotation and a Freezing Ocean
1460: 1256: 3980: 1847: 4187: 3585: 3518: 3444: 3434: 1720: 4672: 1546: 920:. Dione's ice shell is thought to vary in thickness by less than 5%, with the thinnest areas at the poles, where 591: 560: 83: 4619: 4281: 4212: 2535: 4296: 1267: 913: 417: 300: 289: 2411: 2184: 866: 4839: 5051: 4964:
Atmospheres in boldface are significant atmospheres; atmospheres in italics are unconfirmed atmospheres.
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orbiter performed a closer flyby of Dione at 500 km (310 mi) on 11 October 2005, and captured
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of 1,123 km and a density of about 1.48 g/cm, Dione is composed of an icy mantle and crust overlying a
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can most easily be explained by the presence of such an ocean. Neither moon has a shape close to
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suggest a roughly 400 km radius rocky core surrounded by a roughly 160 km envelope of H
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Sven Simon; Joachim Saur; itz M. Neubauer; Alexandre Wennmacher; Michele K. Dougherty (2011).
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rather than a tenuous atmosphere. The density of molecular oxygen ions determined from the
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flyby was performed on 17 August 2015 at a distance of 474 km (295 mi).
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Subsurface Structure and Thermal History of Icy Satellites from Stereo Topography
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images of the cliffs, showing that some of them are several hundred metres high.
728:. The resonance also maintains a smaller eccentricity in Dione's orbit (0.0022), 4914: 4874: 4498: 4464: 4439: 4061: 3923: 3916: 3910: 3842: 3792: 3787: 3704: 3412: 3402: 3385: 3380: 3354: 3349: 3336: 3325: 3317: 3312: 3307: 3302: 3297: 3262: 3249: 3207: 3202: 3197: 3186: 3176: 3166: 3126: 3118: 3113: 3066: 3048: 2997: 2961: 2936: 2859: 2840: 2774: 2744: 2452: 1050: 928: 599: 473: 1432: 1407: 1161: 4688: 4575: 4331: 4320: 4177: 3877: 3847: 3828: 3770: 3735: 3459: 3454: 3449: 3407: 3370: 3233: 3228: 3223: 3102: 3061: 3016: 3008: 2992: 2984: 2966: 2926: 2906: 2869: 2864: 2803: 2790: 2604: 2581: 1457:"Solar System Exploration: Planets: Saturn: Moons: Dione: Facts & Figures" 995: 908:). Downward bending of the surface associated with the 1.5 km high ridge 441: 42: 2022: 1482:
Verbiscer, A.; French, R.; Showalter, M.; Helfenstein, P. (9 February 2007).
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space probes. It has also been probed five times from close distances by the
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was created from a revision of this article dated 18 January 2010
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Monthly Notices of the Royal Astronomical Society, Vol. 8, No. 3, pp. 42–43
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Though somewhat smaller and denser, Dione is otherwise very similar to
372: 2516: 2097:; Edward C. Sittler; Andrew J. Coates; et al. (10 January 2012). 1550: 4767: 4725: 4254: 3611: 2845: 1261: 1209: 1010: 954: 709: 641: 553: 452: 277: 2317:. American Geophysical Union, Fall Meeting 2012, abstract #P22B-03. 2287:. American Geophysical Union, Fall Meeting 2010, abstract #P24A-08. 4994: 1890: 1771: 634:
Results of Astronomical Observations made at the Cape of Good Hope,
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plasma spectrometer data ranges from 0.01 to 0.09 per cm.
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rocky core, with rock and water ice roughly equal in mass. Its
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Spacecraft Makes Final Close Flyby of Saturn Moon Dione Today
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Cassini Doubleheader: Flying By Titan and Dione (April 2010)
1094:, Dione's craters lack the high-relief features seen on the 624:. The satellites of Saturn were not named until 1847, when 524: 518: 512: 192: 180: 177: 130: 124: 4223: 882:
At 1,122 km (697 mi) in diameter, Dione is the
957:(chasms; long, deep, steep-sided depressions or canyons) 656:
Animation of Helene's orbit relative to Saturn and Dione
2243:"Cassini to Make Last Close Flyby of Saturn Moon Dione" 1989:"Mysterious Linear Features Across Saturn's Moon Dione" 2337:"Cassini Finds Hints of Activity at Saturn Moon Dione" 2140:"Magnetic signatures of a tenuous atmosphere at Dione" 1685:"Cassini Finds Hints of Activity at Saturn Moon Dione" 4971: 2567:
Listed in approximate increasing distance from Saturn
1627:"Cassini Observes the Active South Pole of Enceladus" 1484:"Enceladus: Cosmic Graffiti Artist Caught in the Act" 1195:
In May 2013, it was announced that NASA's spacecraft
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Picture of Dione in front of Saturn, captured by the
521: 195: 186: 133: 2313:; Hammond, N. P.; Roberts, J. H.; Nimmo, F. (2012). 2099:"Detection of Exospheric O2+ at Saturn's Moon Dione" 509: 174: 121: 4931: 4897: 4830: 4791: 4724: 4695: 4606: 4535: 4514: 4310: 4274: 4002: 3635: 3584: 3517: 3394: 2945: 2935: 2882: 2833: 2817: 2783: 2773: 2682: 2654: 2633: 2595: 2572: 2220:"Cassini Sends Back Views After Zooming Past Dione" 2218:Landau, Elizabeth; Dyches, Preston (17 June 2015). 1971:
Overlooked Ocean Worlds Fill the Outer Solar System
1118:On 7 April 2010, instruments on board the uncrewed 515: 482: 472: 451: 439: 415: 403: 388: 369: 337: 316: 298: 294:
1128.8 × 1122.6 × 1119.2 km
288: 283: 271: 261: 243: 231: 213: 206: 183: 162: 147: 127: 112: 102: 97: 89: 77: 72: 1573: 1330: 1328: 2038:Cratering time scales for the Galilean satellites 41:"Saturn IV" redirects here. For the rocket, see 2453:Images of Dione at JPL's Planetary Photojournal 1848:"Another Saturn Moon May Hide Subsurface Ocean" 2390: 1927: 1925: 1752: 1750: 1401: 1399: 1397: 559:The moon was discovered by Italian astronomer 4673: 4239: 3491: 2543: 2283:Collins, G. C. (2010). Collins, G. C. (ed.). 1871: 1869: 1363: 1361: 1233:– moon at Dione's trailing Lagrangian point, 8: 890:Shape and gravity observations collected by 616:. Cassini found Dione in 1684 using a large 552:is marked by large cliffs and scarps called 48: 4680: 4666: 4658: 4246: 4232: 4224: 3498: 3484: 3476: 2942: 2780: 2550: 2536: 2528: 571:. Dione was first imaged up-close by the 60:Dione photographed in natural light by the 54: 2181:"Cassini Views Dione, a Frigid Ice World" 2163: 2122: 2012: 1889: 1770: 1707:"IAUC 6162: Poss. Sats OF SATURN; AL Com" 1431: 5062:Discoveries by Giovanni Domenico Cassini 2407:, and does not reflect subsequent edits. 2088: 2086: 2084: 2057: 2055: 1547:"Classic Satellites of the Solar System" 1406:Jacobson, Robert. A. (1 November 2022). 1021:This hypothesis was proven wrong by the 775: 563:in 1684 and is named after the Titaness 5057:Astronomical objects discovered in 1684 4978: 1987:Martin, E. S.; Patthoff, D. A. (2018). 1248: 2179:Martinez, Carolina (17 October 2005). 1580:. Cambridge University Press. p.  1535:(supporting online material, table S1) 47: 985:Ice cliffs (formerly 'wispy terrain') 856:Physical characteristics and interior 612:("the stars of Louis") to honor king 7: 2428:NASA's Solar System Exploration site 2291:. Vol. 2010. pp. P24A–08. 2093:Robert L. Tokar; Robert E. Johnson; 2035:Shoemaker, E. M.; and Wolfe, R. F.; 1549:. Observatorio ARVAL. Archived from 1545:Observatorio ARVAL (15 April 2007). 862:List of geological features on Dione 594:named the four moons he discovered ( 2064:"Oxygen envelops Saturn's icy moon" 916:; the deviations are maintained by 2241:Dyches, Preston (13 August 2015). 2208:. NASA – Cassini Solstice MIssion. 1732:, second edition, 1983 pp 110, 114 752:. They are located within Dione's 25: 2049:, Tucson (AZ) (1982), pp. 277–339 1082:proposed a cratering model for a 950:features of the following types: 636:suggesting that the names of the 5029: 5017: 5005: 4993: 4981: 4715: 4642: 4641: 3575: 3569: 3563: 2517:USGS planetary nomenclature page 2389: 1210:Former classification of planets 933:leading and trailing hemispheres 902:internal liquid salt water ocean 620:he set up on the grounds of the 577:space probe in 1980. Later, the 505: 170: 117: 4869: 1854:. Discovery Communications, LLC 1342:. 20 April 2003. Archived from 704:about 2% less than that of the 2493:Dione atlas (Sept. 2011) from 2485:basemaps (December 2011) from 2273:Calla Cofield. 17 August 2015. 2062:Ghosh, Pallab (2 March 2012). 1576:The Planet Observer's Handbook 1284:Merriam-Webster.com Dictionary 1175:Dione was first imaged by the 1: 4527:Saturn-crossing minor planets 2524:, interactive map of the moon 1846:Howell, E. (5 October 2016). 984: 946:Scientists recognise Dionean 740:Dione has two co-orbital, or 2513:Dione map with feature names 2433:The Planetary Society: Dione 2144:Geophysical Research Letters 2103:Geophysical Research Letters 1993:Geophysical Research Letters 1958:10.1016/j.icarus.2012.12.021 1878:Geophysical Research Letters 1811:"NASA Astrobiology Strategy" 1789:10.1016/j.icarus.2020.113713 1683:Jia-Rui Cook (29 May 2013). 1455:Phil Davis? (1 April 2011). 1378:10.1007/978-1-4020-9217-6_24 267:0.019° (to Saturn's equator) 30:Not to be confused with the 5067:Moons with a prograde orbit 4949:Extraterrestrial atmosphere 2222:. Jet Propulsion Laboratory 2047:University of Arizona Press 2041:, in Morrison, D., editor; 1370:Saturn from Cassini-Huygens 1336:"Data for our solar system" 808:(1. 096 ± 0.000 0246) × 10 700:Dione orbits Saturn with a 5083: 2289:AGU Fall Meeting Abstracts 1721:Guinness Book of Astronomy 1217:– moon at Dione's leading 924:of the crust is greatest. 859: 40: 29: 4962: 4713: 4637: 4261: 4168: 3561: 3420: 2565: 2446:17 September 2011 at the 969:(long narrow depressions) 640:(sisters and brothers of 592:Giovanni Domenico Cassini 561:Giovanni Domenico Cassini 494: 246:Orbital period (sidereal) 53: 4620:The Day the Earth Smiled 4020:: 5268 km / 0.413 Earths 1433:10.3847/1538-3881/ac90c9 1412:The Astronomical Journal 536:, is the fourth-largest 284:Physical characteristics 2481:31 October 2018 at the 2470:31 October 2018 at the 2458:3D shape model of Dione 1999:(20): 10, 978–10, 986. 1884:(19): 10, 088–10, 096. 1654:10.1126/science.1123013 1508:10.1126/science.1134681 1306:26 October 2021 at the 1268:Oxford University Press 914:hydrostatic equilibrium 418:Synodic rotation period 208:Orbital characteristics 2385: 2365:Listen to this article 2183:. NASA. Archived from 1820:. 2015. Archived from 1572:Fred W. Price (2000). 1459:. NASA. Archived from 1300:Cassini: Dionean Linea 1172: 1115: 1070: 999: 943: 879: 708:. However, reflecting 697: 2384: 2043:Satellites of Jupiter 1264:UK English Dictionary 1164: 1113: 1068: 992: 941: 869: 788:Semi-major axis (km) 655: 4939:Prebiotic atmosphere 4193:Planetary-mass moons 2416:More spoken articles 2165:10.1029/2011GL048454 2124:10.1029/2011GL050452 2014:10.1029/2018GL079819 1908:10.1002/2016GL070650 1553:on 20 September 2011 1372:. pp. 763–781. 1297:JPL (13 March 2007) 942:Dione in true color. 2502:17 May 2021 at the 2323:2012AGUFM.P22B..03P 2297:2010AGUFM.P24A..08C 2156:2011GeoRL..3815102S 2115:2012GeoRL..39.3105T 2095:Michelle F. Thomsen 2005:2018GeoRL..4510978M 1975:Scientific American 1950:2013Icar..223..418H 1900:2016GeoRL..4310088B 1827:on 22 December 2016 1781:2020Icar..34513713Z 1743:Triton (moon)#Notes 1730:Guinness Publishing 1646:2006Sci...311.1393P 1640:(5766): 1393–1401. 1500:2007Sci...315..815V 1424:2022AJ....164..199J 998:are at lower right. 870:Size comparison of 778: 550:trailing hemisphere 532:), also designated 90:Discovery date 50: 18:Atmosphere of Dione 4954:Stellar atmosphere 4832:Natural satellites 4629:(2018 documentary) 4173:Discovery timeline 3507:Natural satellites 2509:Dione nomenclature 2386: 1463:on 12 October 2012 1318:Len Krisak (2011) 1287:. Merriam-Webster. 1173: 1116: 1071: 1000: 944: 880: 776: 771:Stephen P. Synnott 698: 485:Apparent magnitude 79:Discovered by 67:spacecraft in 2008 4969: 4968: 4655: 4654: 4627:In Saturn's Rings 4323: 4221: 4220: 4021: 3473: 3472: 2975: 2974: 2878: 2877: 2634:Other inner moons 2382: 1977:. 4 October 2017. 1612:(14 January 1848) 1591:978-0-521-78981-3 1387:978-1-4020-9216-9 1320:Virgil's Eclogues 1274:on 22 March 2020. 884:15th largest moon 853: 852: 754:Lagrangian points 714:orbital resonance 662: Polydeuces 622:Paris Observatory 498: 497: 273:Satellite of 16:(Redirected from 5074: 5034: 5033: 5032: 5022: 5021: 5020: 5010: 5009: 5008: 4998: 4997: 4986: 4985: 4984: 4977: 4719: 4682: 4675: 4668: 4659: 4645: 4644: 4569: 4562: 4319: 4287:Great White Spot 4248: 4241: 4234: 4225: 4016: 3995: 3983: 3969: 3955: 3938: 3926: 3919: 3900: 3886: 3872: 3837: 3823: 3809: 3804: 3782: 3777: 3765: 3758: 3744: 3730: 3713: 3696: 3686: 3677: 3663: 3579: 3573: 3567: 3500: 3493: 3486: 3477: 3395:Outlier prograde 2943: 2834:Siarnaq subgroup 2818:Paaliaq subgroup 2781: 2552: 2545: 2538: 2529: 2460:(requires WebGL) 2406: 2404: 2393: 2392: 2383: 2373: 2371: 2366: 2353: 2352: 2350: 2348: 2333: 2327: 2326: 2307: 2301: 2300: 2280: 2274: 2264: 2258: 2257: 2255: 2253: 2238: 2232: 2231: 2229: 2227: 2215: 2209: 2203: 2197: 2196: 2194: 2192: 2176: 2170: 2169: 2167: 2135: 2129: 2128: 2126: 2090: 2079: 2078: 2076: 2074: 2059: 2050: 2033: 2027: 2026: 2016: 1984: 1978: 1968: 1962: 1961: 1932:Hammond, N. P.; 1929: 1920: 1919: 1893: 1873: 1864: 1863: 1861: 1859: 1843: 1837: 1836: 1834: 1832: 1826: 1815: 1807: 1801: 1800: 1774: 1754: 1745: 1739: 1733: 1717: 1711: 1710: 1703: 1697: 1696: 1694: 1692: 1680: 1674: 1673: 1631: 1619: 1613: 1602: 1596: 1595: 1579: 1569: 1563: 1562: 1560: 1558: 1542: 1536: 1534: 1532: 1530: 1479: 1473: 1472: 1470: 1468: 1452: 1446: 1445: 1435: 1403: 1392: 1391: 1365: 1356: 1355: 1353: 1351: 1340:Exp.arc.nasa.gov 1332: 1323: 1316: 1310: 1295: 1289: 1288: 1275: 1270:. Archived from 1253: 1219:Lagrangian point 1136: 1135: 1134: 849:21 October 2004 827:(7.1 ±0.2) × 10 779: 696: 694: 685: 683: 674: 672: 663: 661: 626:William Herschel 618:aerial telescope 531: 530: 527: 526: 523: 520: 517: 514: 511: 463: 461: 429: 427: 384: 383:0.0032 g/cm 382: 364: 360: 358: 354: 350: 347: 333: 331: 328: 312: 310: 257: 255: 239: 227: 225: 202: 201: 198: 197: 194: 191: 188: 185: 182: 179: 176: 143: 142: 139: 138: 135: 132: 129: 126: 123: 84:Giovanni Cassini 58: 51: 21: 5082: 5081: 5077: 5076: 5075: 5073: 5072: 5071: 5042: 5041: 5040: 5030: 5028: 5018: 5016: 5006: 5004: 4992: 4982: 4980: 4972: 4970: 4965: 4958: 4927: 4893: 4826: 4787: 4720: 4711: 4691: 4686: 4656: 4651: 4633: 4602: 4582:Voyager program 4565: 4558: 4546:Cassini–Huygens 4531: 4510: 4306: 4270: 4257: 4252: 4222: 4217: 4183:Irregular moons 4164: 4004: 3998: 3993: 3988: 3979: 3965: 3951: 3936: 3931: 3922: 3915: 3896: 3882: 3868: 3860:Jupiter trojans 3833: 3819: 3807: 3802: 3780: 3775: 3761: 3754: 3740: 3728: 3709: 3694: 3689: 3682: 3673: 3659: 3638: 3631: 3587: 3580: 3574: 3568: 3559: 3520: 3513: 3504: 3474: 3469: 3430:Cassini–Huygens 3425:Rings of Saturn 3416: 3397:irregular moons 3396: 3390: 2971: 2946:Phoebe subgroup 2931: 2874: 2829: 2813: 2784:Kiviuq subgroup 2769: 2684: 2678: 2650: 2629: 2591: 2568: 2561: 2559:Moons of Saturn 2556: 2522:Google Dione 3D 2504:Wayback Machine 2483:Wayback Machine 2472:Wayback Machine 2448:Wayback Machine 2441:images of Dione 2420: 2419: 2408: 2402: 2400: 2397:This audio file 2394: 2387: 2378: 2375: 2369: 2368: 2364: 2361: 2356: 2346: 2344: 2335: 2334: 2330: 2311:Phillips, C. B. 2309: 2308: 2304: 2282: 2281: 2277: 2265: 2261: 2251: 2249: 2240: 2239: 2235: 2225: 2223: 2217: 2216: 2212: 2204: 2200: 2190: 2188: 2178: 2177: 2173: 2137: 2136: 2132: 2092: 2091: 2082: 2072: 2070: 2061: 2060: 2053: 2034: 2030: 1986: 1985: 1981: 1969: 1965: 1934:Phillips, C. B. 1931: 1930: 1923: 1875: 1874: 1867: 1857: 1855: 1845: 1844: 1840: 1830: 1828: 1824: 1813: 1809: 1808: 1804: 1756: 1755: 1748: 1740: 1736: 1718: 1714: 1705: 1704: 1700: 1690: 1688: 1682: 1681: 1677: 1629: 1621: 1620: 1616: 1606:William Lassell 1604:As reported by 1603: 1599: 1592: 1571: 1570: 1566: 1556: 1554: 1544: 1543: 1539: 1528: 1526: 1481: 1480: 1476: 1466: 1464: 1454: 1453: 1449: 1405: 1404: 1395: 1388: 1367: 1366: 1359: 1349: 1347: 1346:on 9 March 2005 1334: 1333: 1326: 1317: 1313: 1308:Wayback Machine 1296: 1292: 1277: 1276: 1255: 1254: 1250: 1246: 1238: 1226: 1206: 1159: 1133: 1130: 1129: 1128: 1126: 1108: 1063: 1046: 1044:Linear features 987: 980:(crater chains) 910:Janiculum Dorsa 899: 864: 858: 794:Discovery date 767: 760: 738: 730:tidally heating 692: 691: 681: 680: 670: 669: 659: 658: 657: 650: 609:Sidera Lodoicea 589: 569:Greek mythology 508: 504: 487: 459: 457: 444: 430: 425: 423: 420: 408: 406:Escape velocity 393: 391:Surface gravity 380: 378: 375: 362: 356: 352: 348: 345: 343: 329: 326: 324: 321: 308: 306: 303: 253: 251: 248: 237: 223: 221: 218: 216:Semi-major axis 173: 169: 150: 120: 116: 105: 68: 61: 46: 39: 28: 23: 22: 15: 12: 11: 5: 5080: 5078: 5070: 5069: 5064: 5059: 5054: 5044: 5043: 5039: 5038: 5026: 5014: 5002: 4990: 4967: 4966: 4963: 4960: 4959: 4957: 4956: 4951: 4946: 4941: 4935: 4933: 4929: 4928: 4926: 4925: 4918: 4911: 4903: 4901: 4895: 4894: 4892: 4891: 4884: 4877: 4872: 4867: 4862: 4857: 4852: 4847: 4842: 4836: 4834: 4828: 4827: 4825: 4824: 4817: 4810: 4803: 4797: 4795: 4789: 4788: 4786: 4785: 4778: 4771: 4764: 4757: 4750: 4743: 4736: 4730: 4728: 4722: 4721: 4714: 4712: 4710: 4709: 4701: 4699: 4693: 4692: 4687: 4685: 4684: 4677: 4670: 4662: 4653: 4652: 4650: 4649: 4638: 4635: 4634: 4632: 4631: 4623: 4616: 4610: 4608: 4604: 4603: 4601: 4600: 4599: 4598: 4591: 4579: 4572: 4571: 4570: 4563: 4541: 4539: 4533: 4532: 4530: 4529: 4524: 4522:Delta Octantis 4518: 4516: 4512: 4511: 4509: 4508: 4507: 4506: 4496: 4495: 4494: 4484: 4483: 4482: 4477: 4472: 4462: 4455: 4450: 4443: 4436: 4435: 4434: 4429: 4417: 4416: 4415: 4410: 4398: 4391: 4386: 4381: 4376: 4369: 4364: 4359: 4354: 4349: 4344: 4339: 4334: 4329: 4324: 4316: 4314: 4308: 4307: 4305: 4304: 4299: 4294: 4289: 4284: 4278: 4276: 4272: 4271: 4269: 4268: 4262: 4259: 4258: 4253: 4251: 4250: 4243: 4236: 4228: 4219: 4218: 4216: 4215: 4210: 4205: 4200: 4195: 4190: 4185: 4180: 4175: 4169: 4166: 4165: 4163: 4162: 4159: 4154: 4149: 4144: 4139: 4134: 4129: 4124: 4119: 4114: 4109: 4104: 4099: 4094: 4089: 4084: 4079: 4074: 4069: 4064: 4059: 4054: 4049: 4044: 4039: 4034: 4029: 4024: 4023: 4022: 4008: 4006: 4000: 3999: 3997: 3996: 3991: 3986: 3985: 3984: 3975:Gǃkúnǁʼhòmdímà 3972: 3971: 3970: 3958: 3957: 3956: 3944: 3939: 3934: 3929: 3928: 3927: 3920: 3908: 3904: 3903: 3902: 3901: 3889: 3888: 3887: 3875: 3874: 3873: 3861: 3857: 3856: 3850: 3845: 3840: 3839: 3838: 3826: 3825: 3824: 3812: 3811: 3810: 3805: 3795: 3790: 3785: 3784: 3783: 3778: 3768: 3767: 3766: 3759: 3747: 3746: 3745: 3733: 3732: 3731: 3721: 3716: 3715: 3714: 3702: 3698: 3697: 3692: 3687: 3680: 3679: 3678: 3666: 3665: 3664: 3652: 3647: 3643: 3641: 3633: 3632: 3630: 3629: 3624: 3619: 3614: 3609: 3604: 3599: 3593: 3591: 3582: 3581: 3562: 3560: 3558: 3557: 3552: 3547: 3542: 3537: 3532: 3526: 3524: 3515: 3514: 3505: 3503: 3502: 3495: 3488: 3480: 3471: 3470: 3468: 3467: 3462: 3457: 3452: 3447: 3442: 3437: 3432: 3427: 3421: 3418: 3417: 3415: 3410: 3405: 3400: 3398: 3392: 3391: 3389: 3388: 3383: 3378: 3373: 3368: 3365: 3362: 3357: 3352: 3347: 3344: 3339: 3334: 3331: 3328: 3323: 3320: 3315: 3310: 3305: 3300: 3295: 3290: 3287: 3284: 3281: 3278: 3273: 3268: 3265: 3260: 3255: 3252: 3247: 3244: 3241: 3236: 3231: 3226: 3221: 3218: 3215: 3210: 3205: 3200: 3195: 3192: 3189: 3184: 3179: 3174: 3169: 3164: 3161: 3156: 3151: 3146: 3143: 3140: 3137: 3134: 3129: 3124: 3121: 3116: 3111: 3108: 3105: 3100: 3095: 3090: 3085: 3080: 3075: 3072: 3069: 3064: 3059: 3054: 3051: 3046: 3041: 3036: 3033: 3030: 3027: 3024: 3019: 3014: 3011: 3006: 3003: 3000: 2995: 2990: 2987: 2982: 2976: 2973: 2972: 2970: 2969: 2964: 2959: 2949: 2947: 2940: 2933: 2932: 2930: 2929: 2924: 2919: 2914: 2909: 2904: 2899: 2889: 2887: 2880: 2879: 2876: 2875: 2873: 2872: 2867: 2862: 2857: 2848: 2843: 2837: 2835: 2831: 2830: 2828: 2827: 2821: 2819: 2815: 2814: 2812: 2811: 2806: 2801: 2798: 2793: 2787: 2785: 2778: 2771: 2770: 2768: 2767: 2760: 2755: 2748: 2741: 2740: 2739: 2734: 2722: 2721: 2720: 2715: 2703: 2696: 2688: 2686: 2685:(with trojans) 2680: 2679: 2677: 2676: 2671: 2666: 2660: 2658: 2652: 2651: 2649: 2648: 2643: 2637: 2635: 2631: 2630: 2628: 2627: 2622: 2617: 2612: 2607: 2601: 2599: 2597:Ring shepherds 2593: 2592: 2590: 2589: 2584: 2578: 2576: 2570: 2569: 2566: 2563: 2562: 2557: 2555: 2554: 2547: 2540: 2532: 2526: 2525: 2519: 2506: 2490: 2461: 2455: 2450: 2435: 2430: 2409: 2395: 2388: 2376: 2363: 2362: 2360: 2359:External links 2357: 2355: 2354: 2328: 2302: 2275: 2259: 2233: 2210: 2198: 2187:on 11 May 2021 2171: 2130: 2080: 2051: 2028: 1979: 1973:. John Wenz, 1963: 1944:(1): 418–422. 1921: 1865: 1838: 1802: 1746: 1734: 1712: 1698: 1675: 1614: 1597: 1590: 1564: 1537: 1474: 1447: 1393: 1386: 1357: 1324: 1311: 1290: 1247: 1245: 1242: 1241: 1240: 1236: 1228: 1224: 1212: 1205: 1202: 1158: 1155: 1131: 1107: 1104: 1084:tidally locked 1062: 1059: 1045: 1042: 986: 983: 982: 981: 975: 970: 964: 958: 897: 857: 854: 851: 850: 847: 844: 841: 838: 832: 831: 828: 825: 822: 819: 813: 812: 811:30 March 1684 809: 806: 803: 800: 796: 795: 792: 789: 786: 785:Diameter (km) 783: 777:Dione trojans 765: 758: 737: 734: 702:semimajor axis 649: 646: 588: 585: 538:moon of Saturn 534:Saturn IV 496: 495: 492: 491: 488: 483: 480: 479: 476: 470: 469: 455: 449: 448: 445: 440: 437: 436: 421: 416: 413: 412: 409: 404: 401: 400: 394: 389: 386: 385: 376: 370: 367: 366: 341: 335: 334: 322: 317: 314: 313: 304: 299: 296: 295: 292: 286: 285: 281: 280: 275: 269: 268: 265: 259: 258: 249: 244: 241: 240: 235: 229: 228: 219: 214: 211: 210: 204: 203: 166: 160: 159: 151: 148: 145: 144: 114: 110: 109: 106: 103: 100: 99: 95: 94: 91: 87: 86: 81: 75: 74: 70: 69: 59: 27:Moon of Saturn 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 5079: 5068: 5065: 5063: 5060: 5058: 5055: 5053: 5050: 5049: 5047: 5037: 5027: 5025: 5015: 5013: 5003: 5001: 4996: 4991: 4989: 4979: 4975: 4961: 4955: 4952: 4950: 4947: 4945: 4942: 4940: 4937: 4936: 4934: 4930: 4924: 4923: 4919: 4917: 4916: 4912: 4910: 4909: 4905: 4904: 4902: 4900: 4896: 4890: 4889: 4885: 4883: 4882: 4878: 4876: 4873: 4871: 4868: 4866: 4863: 4861: 4858: 4856: 4853: 4851: 4848: 4846: 4843: 4841: 4838: 4837: 4835: 4833: 4829: 4823: 4822: 4818: 4816: 4815: 4811: 4809: 4808: 4804: 4802: 4799: 4798: 4796: 4794: 4793:Dwarf planets 4790: 4784: 4783: 4779: 4777: 4776: 4772: 4770: 4769: 4765: 4763: 4762: 4758: 4756: 4755: 4751: 4749: 4748: 4744: 4742: 4741: 4737: 4735: 4732: 4731: 4729: 4727: 4723: 4718: 4708: 4707: 4703: 4702: 4700: 4698: 4694: 4690: 4683: 4678: 4676: 4671: 4669: 4664: 4663: 4660: 4648: 4640: 4639: 4636: 4630: 4628: 4624: 4622: 4621: 4617: 4615: 4612: 4611: 4609: 4605: 4597: 4596: 4592: 4590: 4589: 4585: 4584: 4583: 4580: 4578: 4577: 4573: 4568: 4564: 4561: 4557: 4556: 4554: 4553: 4548: 4547: 4543: 4542: 4540: 4538: 4534: 4528: 4525: 4523: 4520: 4519: 4517: 4513: 4505: 4502: 4501: 4500: 4497: 4493: 4490: 4489: 4488: 4485: 4481: 4478: 4476: 4473: 4471: 4468: 4467: 4466: 4463: 4461: 4460: 4456: 4454: 4451: 4449: 4448: 4444: 4442: 4441: 4437: 4433: 4430: 4428: 4425: 4424: 4423: 4422: 4418: 4414: 4411: 4409: 4406: 4405: 4404: 4403: 4399: 4397: 4396: 4392: 4390: 4387: 4385: 4382: 4380: 4377: 4375: 4374: 4370: 4368: 4365: 4363: 4360: 4358: 4355: 4353: 4350: 4348: 4345: 4343: 4340: 4338: 4335: 4333: 4330: 4328: 4327:Ring moonlets 4325: 4322: 4318: 4317: 4315: 4313: 4309: 4303: 4300: 4298: 4297:Magnetosphere 4295: 4293: 4290: 4288: 4285: 4283: 4280: 4279: 4277: 4273: 4267: 4264: 4263: 4260: 4256: 4249: 4244: 4242: 4237: 4235: 4230: 4229: 4226: 4214: 4211: 4209: 4208:Regular moons 4206: 4204: 4201: 4199: 4196: 4194: 4191: 4189: 4186: 4184: 4181: 4179: 4176: 4174: 4171: 4170: 4167: 4160: 4158: 4155: 4153: 4150: 4148: 4145: 4143: 4140: 4138: 4135: 4133: 4130: 4128: 4125: 4123: 4120: 4118: 4115: 4113: 4110: 4108: 4105: 4103: 4100: 4098: 4095: 4093: 4090: 4088: 4085: 4083: 4080: 4078: 4075: 4073: 4070: 4068: 4065: 4063: 4060: 4058: 4055: 4053: 4050: 4048: 4045: 4043: 4040: 4038: 4035: 4033: 4030: 4028: 4025: 4019: 4015: 4014: 4013: 4010: 4009: 4007: 4001: 3994: 3987: 3982: 3978: 3977: 3976: 3973: 3968: 3964: 3963: 3962: 3959: 3954: 3950: 3949: 3948: 3945: 3943: 3940: 3937: 3930: 3925: 3921: 3918: 3914: 3913: 3912: 3909: 3906: 3905: 3899: 3895: 3894: 3893: 3890: 3885: 3881: 3880: 3879: 3876: 3871: 3867: 3866: 3865: 3862: 3859: 3858: 3854: 3851: 3849: 3846: 3844: 3841: 3836: 3832: 3831: 3830: 3827: 3822: 3818: 3817: 3816: 3813: 3806: 3801: 3800: 3799: 3796: 3794: 3791: 3789: 3786: 3779: 3774: 3773: 3772: 3769: 3764: 3760: 3757: 3753: 3752: 3751: 3748: 3743: 3739: 3738: 3737: 3734: 3727: 3726: 3725: 3722: 3720: 3717: 3712: 3708: 3707: 3706: 3703: 3700: 3699: 3695: 3688: 3685: 3681: 3676: 3672: 3671: 3670: 3667: 3662: 3658: 3657: 3656: 3653: 3651: 3648: 3645: 3644: 3642: 3640: 3634: 3628: 3625: 3623: 3620: 3618: 3615: 3613: 3610: 3608: 3605: 3603: 3600: 3598: 3595: 3594: 3592: 3589: 3583: 3578: 3572: 3566: 3556: 3553: 3551: 3548: 3546: 3543: 3541: 3538: 3536: 3533: 3531: 3528: 3527: 3525: 3522: 3516: 3512: 3508: 3501: 3496: 3494: 3489: 3487: 3482: 3481: 3478: 3466: 3463: 3461: 3458: 3456: 3453: 3451: 3448: 3446: 3443: 3441: 3438: 3436: 3433: 3431: 3428: 3426: 3423: 3422: 3419: 3414: 3411: 3409: 3406: 3404: 3401: 3399: 3393: 3387: 3384: 3382: 3379: 3377: 3374: 3372: 3369: 3366: 3363: 3361: 3358: 3356: 3353: 3351: 3348: 3345: 3343: 3340: 3338: 3335: 3332: 3329: 3327: 3324: 3321: 3319: 3316: 3314: 3311: 3309: 3306: 3304: 3301: 3299: 3296: 3294: 3291: 3288: 3285: 3282: 3279: 3277: 3274: 3272: 3269: 3266: 3264: 3261: 3259: 3256: 3253: 3251: 3248: 3245: 3242: 3240: 3237: 3235: 3232: 3230: 3227: 3225: 3222: 3219: 3216: 3214: 3211: 3209: 3206: 3204: 3201: 3199: 3196: 3193: 3190: 3188: 3185: 3183: 3180: 3178: 3175: 3173: 3170: 3168: 3165: 3162: 3160: 3157: 3155: 3152: 3150: 3147: 3144: 3141: 3138: 3135: 3133: 3130: 3128: 3125: 3122: 3120: 3117: 3115: 3112: 3109: 3106: 3104: 3101: 3099: 3096: 3094: 3091: 3089: 3086: 3084: 3081: 3079: 3076: 3073: 3070: 3068: 3065: 3063: 3060: 3058: 3055: 3052: 3050: 3047: 3045: 3042: 3040: 3037: 3034: 3031: 3028: 3025: 3023: 3020: 3018: 3015: 3012: 3010: 3007: 3004: 3001: 2999: 2996: 2994: 2991: 2988: 2986: 2983: 2981: 2978: 2977: 2968: 2965: 2963: 2960: 2958: 2957: 2956: 2951: 2950: 2948: 2944: 2941: 2938: 2934: 2928: 2925: 2923: 2920: 2918: 2915: 2913: 2910: 2908: 2905: 2903: 2900: 2898: 2897: 2896: 2891: 2890: 2888: 2885: 2881: 2871: 2868: 2866: 2863: 2861: 2858: 2856: 2855: 2854: 2849: 2847: 2844: 2842: 2839: 2838: 2836: 2832: 2826: 2823: 2822: 2820: 2816: 2810: 2807: 2805: 2802: 2799: 2797: 2794: 2792: 2789: 2788: 2786: 2782: 2779: 2776: 2772: 2766: 2765: 2761: 2759: 2756: 2754: 2753: 2749: 2747: 2746: 2742: 2738: 2735: 2733: 2730: 2729: 2728: 2727: 2723: 2719: 2716: 2714: 2711: 2710: 2709: 2708: 2704: 2702: 2701: 2697: 2695: 2694: 2690: 2689: 2687: 2681: 2675: 2672: 2670: 2667: 2665: 2662: 2661: 2659: 2657: 2653: 2647: 2644: 2642: 2639: 2638: 2636: 2632: 2626: 2623: 2621: 2618: 2616: 2613: 2611: 2608: 2606: 2603: 2602: 2600: 2598: 2594: 2588: 2585: 2583: 2580: 2579: 2577: 2575: 2574:Ring moonlets 2571: 2564: 2560: 2553: 2548: 2546: 2541: 2539: 2534: 2533: 2530: 2523: 2520: 2518: 2514: 2510: 2507: 2505: 2501: 2498: 2496: 2491: 2488: 2484: 2480: 2477: 2473: 2469: 2466: 2462: 2459: 2456: 2454: 2451: 2449: 2445: 2442: 2440: 2436: 2434: 2431: 2429: 2425: 2424:Dione Profile 2422: 2421: 2417: 2413: 2398: 2358: 2343:. 29 May 2013 2342: 2338: 2332: 2329: 2324: 2320: 2316: 2312: 2306: 2303: 2298: 2294: 2290: 2286: 2279: 2276: 2272: 2268: 2263: 2260: 2248: 2244: 2237: 2234: 2221: 2214: 2211: 2207: 2202: 2199: 2186: 2182: 2175: 2172: 2166: 2161: 2157: 2153: 2150:(L15102): 5. 2149: 2145: 2141: 2134: 2131: 2125: 2120: 2116: 2112: 2108: 2104: 2100: 2096: 2089: 2087: 2085: 2081: 2069: 2065: 2058: 2056: 2052: 2048: 2044: 2040: 2039: 2032: 2029: 2024: 2020: 2015: 2010: 2006: 2002: 1998: 1994: 1990: 1983: 1980: 1976: 1972: 1967: 1964: 1959: 1955: 1951: 1947: 1943: 1939: 1935: 1928: 1926: 1922: 1917: 1913: 1909: 1905: 1901: 1897: 1892: 1887: 1883: 1879: 1872: 1870: 1866: 1853: 1849: 1842: 1839: 1823: 1819: 1812: 1806: 1803: 1798: 1794: 1790: 1786: 1782: 1778: 1773: 1768: 1765:(1): 113713. 1764: 1760: 1753: 1751: 1747: 1744: 1738: 1735: 1731: 1727: 1726:Patrick Moore 1723: 1722: 1716: 1713: 1708: 1702: 1699: 1686: 1679: 1676: 1671: 1667: 1663: 1659: 1655: 1651: 1647: 1643: 1639: 1635: 1628: 1624: 1618: 1615: 1611: 1607: 1601: 1598: 1593: 1587: 1583: 1578: 1577: 1568: 1565: 1552: 1548: 1541: 1538: 1525: 1521: 1517: 1513: 1509: 1505: 1501: 1497: 1494:(5813): 815. 1493: 1489: 1485: 1478: 1475: 1462: 1458: 1451: 1448: 1443: 1439: 1434: 1429: 1425: 1421: 1417: 1413: 1409: 1402: 1400: 1398: 1394: 1389: 1383: 1379: 1375: 1371: 1364: 1362: 1358: 1345: 1341: 1337: 1331: 1329: 1325: 1321: 1315: 1312: 1309: 1305: 1302: 1301: 1294: 1291: 1286: 1285: 1280: 1273: 1269: 1265: 1263: 1258: 1252: 1249: 1243: 1239: 1232: 1229: 1227: 1220: 1216: 1213: 1211: 1208: 1207: 1203: 1201: 1198: 1193: 1191: 1187: 1185: 1180: 1179: 1171: 1169: 1163: 1156: 1154: 1151: 1146: 1144: 1140: 1124: 1122: 1112: 1105: 1103: 1101: 1097: 1093: 1088: 1085: 1081: 1077: 1067: 1060: 1058: 1056: 1052: 1043: 1041: 1039: 1035: 1030: 1027: 1025: 1019: 1016: 1015:cryovolcanism 1012: 1007: 1006: 997: 991: 979: 976: 974: 971: 968: 965: 962: 959: 956: 953: 952: 951: 949: 940: 936: 934: 930: 925: 923: 922:tidal heating 919: 915: 911: 907: 903: 895: 894: 888: 885: 877: 873: 868: 863: 855: 848: 845: 842: 839: 837: 834: 833: 830:1 March 1980 829: 826: 823: 820: 818: 815: 814: 810: 807: 804: 801: 798: 797: 793: 790: 787: 784: 781: 780: 774: 772: 768: 761: 755: 751: 747: 743: 735: 733: 731: 727: 723: 719: 715: 711: 707: 703: 689: 678: 667: 654: 647: 645: 643: 639: 635: 631: 630:John Herschel 627: 623: 619: 615: 611: 610: 605: 601: 597: 593: 586: 584: 582: 581: 576: 575: 570: 566: 562: 557: 555: 551: 547: 543: 542:mean diameter 539: 535: 529: 502: 493: 489: 486: 481: 478:87 K (−186°C) 477: 475: 471: 467: 456: 454: 450: 446: 443: 438: 434: 422: 419: 414: 410: 407: 402: 399: 395: 392: 387: 377: 374: 368: 342: 340: 336: 323: 320: 315: 305: 302: 297: 293: 291: 287: 282: 279: 276: 274: 270: 266: 264: 260: 250: 247: 242: 236: 234: 230: 220: 217: 212: 209: 205: 200: 167: 165: 161: 158: 155: 152: 146: 141: 115: 113:Pronunciation 111: 107: 101: 96: 93:30 March 1684 92: 88: 85: 82: 80: 76: 71: 66: 65: 57: 52: 44: 37: 33: 19: 5052:Dione (moon) 5036:Solar System 4920: 4913: 4906: 4886: 4879: 4819: 4812: 4805: 4780: 4773: 4766: 4759: 4752: 4745: 4738: 4704: 4626: 4618: 4593: 4586: 4574: 4550: 4544: 4487:Gallic group 4457: 4445: 4438: 4420: 4419: 4400: 4393: 4371: 4282:Dragon Storm 4213:Trojan moons 4203:Subsatellite 4091: 4017: 3742:Petit-Prince 3637:Minor-planet 3586:Dwarf planet 3511:Solar System 3376:Saturn LVIII 2953: 2952: 2893: 2892: 2884:Gallic group 2851: 2850: 2762: 2750: 2743: 2725: 2724: 2705: 2698: 2691: 2494: 2486: 2438: 2345:. Retrieved 2340: 2331: 2314: 2305: 2288: 2284: 2278: 2270: 2262: 2250:. Retrieved 2246: 2236: 2224:. Retrieved 2213: 2201: 2189:. Retrieved 2185:the original 2174: 2147: 2143: 2133: 2106: 2102: 2071:. Retrieved 2067: 2042: 2037: 2031: 1996: 1992: 1982: 1974: 1966: 1941: 1937: 1881: 1877: 1856:. Retrieved 1851: 1841: 1831:26 September 1829:. Retrieved 1822:the original 1817: 1805: 1762: 1758: 1737: 1719: 1715: 1701: 1689:. Retrieved 1678: 1637: 1633: 1623:Porco, C. C. 1617: 1600: 1575: 1567: 1555:. Retrieved 1551:the original 1540: 1527:. Retrieved 1491: 1487: 1477: 1465:. Retrieved 1461:the original 1450: 1415: 1411: 1369: 1348:. Retrieved 1344:the original 1339: 1319: 1314: 1299: 1293: 1282: 1272:the original 1260: 1251: 1196: 1194: 1189: 1183: 1176: 1174: 1167: 1149: 1147: 1142: 1120: 1117: 1089: 1072: 1047: 1033: 1031: 1023: 1020: 1003: 1001: 945: 926: 891: 889: 881: 878:, and Dione. 840:3.06 ± 0.40 739: 732:it as well. 724:geyser-like 722:cryovolcanic 699: 695: Saturn 687: 676: 673: Helene 665: 633: 607: 590: 578: 572: 558: 533: 500: 499: 319:Surface area 233:Eccentricity 156: 98:Designations 63: 5024:Outer space 5012:Spaceflight 4915:HD 209458 b 4689:Atmospheres 4537:Exploration 4499:Norse group 4465:Inuit group 4178:Inner moons 3884:Skamandrios 3413:S/2004 S 24 3403:S/2006 S 12 3386:S/2004 S 52 3381:S/2019 S 21 3367:S/2020 S 10 3364:S/2004 S 51 3355:Saturn LXIV 3350:S/2006 S 19 3346:S/2019 S 20 3337:S/2004 S 36 3333:S/2004 S 53 3330:S/2019 S 16 3326:S/2004 S 39 3322:S/2019 S 18 3318:S/2004 S 21 3313:S/2019 S 19 3298:S/2006 S 18 3289:S/2019 S 17 3286:S/2004 S 49 3283:S/2006 S 17 3280:S/2004 S 50 3267:S/2004 S 48 3250:S/2004 S 28 3246:S/2006 S 15 3243:S/2006 S 16 3217:S/2019 S 15 3208:S/2006 S 14 3203:S/2019 S 13 3194:S/2019 S 12 3191:S/2019 S 10 3177:S/2019 S 11 3167:S/2004 S 46 3136:S/2006 S 13 3127:S/2004 S 12 3123:S/2006 S 11 3119:S/2004 S 17 3110:S/2004 S 45 3107:S/2004 S 44 3071:S/2006 S 10 3067:S/2004 S 43 3049:S/2004 S 13 3035:S/2004 S 42 3032:S/2004 S 41 3005:S/2004 S 40 3002:S/2004 S 47 2998:S/2004 S 37 2962:S/2006 S 20 2937:Norse group 2860:S/2019 S 14 2841:S/2004 S 31 2775:Inuit group 2683:Large moons 1741:See note g 1557:17 December 1529:20 December 1157:Exploration 821:36.2 ± 0.4 684: Dione 644:) be used. 474:Temperature 433:synchronous 332:.51 km 311:0.4 km 301:Mean radius 263:Inclination 149:Named after 104:Designation 5046:Categories 4899:Exoplanets 4576:Pioneer 11 4567:retirement 4432:Polydeuces 4357:Epimetheus 4347:Prometheus 4321:S/2009 S 1 3942:Sila–Nunam 3808:Cleoselene 3803:Alexhelios 3781:Gorgoneion 3719:Euphrosyne 3646:Near-Earth 3588:satellites 3521:satellites 3465:In fiction 3460:S/2004 S 6 3455:S/2004 S 4 3450:S/2004 S 3 3408:S/2019 S 6 3371:S/2020 S 9 3254:S/2020 S 8 3234:S/2005 S 5 3229:S/2006 S 3 3224:S/2004 S 7 3220:S/2020 S 6 3163:S/2019 S 9 3145:S/2019 S 8 3142:S/2019 S 7 3139:S/2007 S 9 3103:S/2007 S 3 3074:S/2019 S 5 3062:S/2006 S 1 3057:Mundilfari 3053:S/2007 S 6 3029:S/2019 S 4 3026:S/2020 S 2 3017:S/2020 S 7 3013:S/2019 S 3 3009:S/2019 S 2 2993:S/2007 S 2 2989:S/2007 S 7 2985:S/2007 S 5 2967:S/2006 S 9 2927:S/2020 S 4 2907:S/2007 S 8 2870:S/2020 S 5 2865:S/2020 S 3 2804:S/2020 S 1 2800:S/2005 S 4 2791:S/2019 S 1 2737:Polydeuces 2656:Alkyonides 2620:Epimetheus 2615:Prometheus 2582:S/2009 S 1 2412:Audio help 2403:2010-01-18 2109:(3): n/a. 1891:1610.00548 1852:Seeker.com 1772:1908.07284 1418:(5): 199. 1244:References 1231:Polydeuces 1106:Atmosphere 996:ray system 948:geological 860:See also: 836:Polydeuces 791:Mass (kg) 750:Polydeuces 716:with moon 632:published 442:Axial tilt 365:10 Earths) 359:10 kg 290:Dimensions 164:Adjectives 43:Saturn C-4 4988:Astronomy 4922:Kepler-7b 4908:GJ 1132 b 4865:Enceladus 4595:Voyager 2 4588:Voyager 1 4515:Astronomy 4395:Enceladus 4275:Geography 4107:Enceladus 3981:Gǃòʼé ǃHú 3892:Eurybates 3870:Menoetius 3864:Patroclus 3853:Dinkinesh 3798:Kleopatra 3701:Main belt 3661:Dimorphos 3519:Planetary 3440:Chrysalis 3083:Bergelmir 3039:Hyrrokkin 2912:Saturn LX 2700:Enceladus 2515:from the 2341:NASA News 2271:Space.com 2252:19 August 2247:NASA News 2191:22 August 2023:1944-8007 1916:119236092 1858:8 October 1797:201103604 1691:1 October 1442:252992162 1139:exosphere 1076:Shoemaker 1002:When the 906:Enceladus 773:in 1982. 744:, moons, 718:Enceladus 614:Louis XIV 598:, Dione, 574:Voyager 1 540:. With a 466:geometric 411:0.51 km/s 108:Saturn IV 73:Discovery 36:106 Dione 4932:See also 4860:Callisto 4855:Ganymede 4814:Makemake 4647:Category 4560:timeline 4492:Albiorix 4453:Hyperion 4152:Hyperion 4102:Dysnomia 4032:Callisto 4012:Ganymede 3835:Olympias 3705:Kalliope 3675:Squannit 3650:Florence 3622:Gonggong 3617:Makemake 3172:Angrboda 3149:Farbauti 3098:Suttungr 3088:Jarnsaxa 2917:Erriapus 2902:Bebhionn 2895:Albiorix 2758:Hyperion 2500:Archived 2479:Archived 2468:Archived 2444:Archived 2414: · 2068:BBC News 1662:16527964 1524:21932253 1516:17289992 1467:24 March 1304:Archived 1204:See also 1092:Callisto 1055:exogenic 963:(ridges) 955:Chasmata 918:isostasy 846:≈8 × 10 843:377 600 824:377 600 805:377 396 554:chasmata 546:silicate 226: km 168:Dionean 32:asteroid 4974:Portals 4782:Neptune 4761:Jupiter 4734:Mercury 4726:Planets 4614:Fiction 4607:Related 4552:Huygens 4480:Siarnaq 4475:Paaliaq 4459:Iapetus 4413:Calypso 4408:Telesto 4389:Pallene 4379:Methone 4367:Aegaeon 4352:Pandora 4337:Daphnis 4292:Hexagon 4266:Outline 4142:Hiʻiaka 4122:Proteus 4112:Miranda 4082:Umbriel 4072:Iapetus 4057:Titania 4018:largest 4005:by size 3990:2013 FY 3947:Salacia 3933:2002 UX 3855:(Selam) 3843:Pulcova 3793:Elektra 3788:Camilla 3771:Minerva 3756:Romulus 3736:Eugenia 3729:Peneius 3691:2001 SN 3684:1994 CC 3655:Didymos 3555:Neptune 3540:Jupiter 3509:of the 3360:Fornjot 3342:Thiazzi 3271:Geirrod 3258:Alvaldi 3239:Skrymir 3213:Gunnlod 3132:Eggther 2853:Siarnaq 2825:Paaliaq 2764:Iapetus 2718:Calypso 2713:Telesto 2674:Pallene 2664:Methone 2646:Pandora 2610:Daphnis 2587:Aegaeon 2495:Cassini 2487:Cassini 2439:Cassini 2401: ( 2372:minutes 2319:Bibcode 2293:Bibcode 2226:21 July 2152:Bibcode 2111:Bibcode 2073:2 March 2001:Bibcode 1946:Bibcode 1896:Bibcode 1777:Bibcode 1670:6976648 1642:Bibcode 1634:Science 1496:Bibcode 1488:Science 1420:Bibcode 1322:, p. 71 1279:"Dione" 1257:"Dione" 1197:Cassini 1190:Cassini 1186:orbiter 1184:Cassini 1178:Voyager 1170:orbiter 1168:Cassini 1150:Cassini 1143:Cassini 1121:Cassini 1100:Mercury 1061:Craters 1038:oblique 1034:Cassini 1024:Cassini 1005:Voyager 978:Catenae 973:Craters 893:Cassini 736:Trojans 628:'s son 604:Iapetus 580:Cassini 428: d 373:density 256: d 64:Cassini 34:called 4888:Triton 4850:Europa 4775:Uranus 4768:Saturn 4504:Phoebe 4470:Kiviuq 4427:Helene 4402:Tethys 4255:Saturn 4198:Naming 4157:Phoebe 4147:Actaea 4137:Nereid 4132:Ilmarë 4097:Tethys 4077:Charon 4067:Oberon 4052:Triton 4047:Europa 4003:Ranked 3967:Ilmarë 3953:Actaea 3878:Hektor 3829:Roxane 3821:Dactyl 3750:Sylvia 3724:Daphne 3669:Moshup 3612:Quaoar 3607:Haumea 3550:Uranus 3545:Saturn 3445:Themis 3435:Chiron 3293:Surtur 3276:Fenrir 3159:Bestla 3154:Thrymr 2980:Skathi 2955:Phoebe 2922:Tarvos 2846:Tarqeq 2809:Ijiraq 2796:Kiviuq 2732:Helene 2707:Tethys 2497:images 2489:images 2465:global 2463:Dione 2347:29 May 2021:  1938:Icarus 1914:  1795:  1759:Icarus 1687:. NASA 1668:  1660:  1588:  1522:  1514:  1440:  1384:  1350:21 May 1262:Lexico 1215:Helene 1011:albedo 967:Fossae 874:, the 817:Helene 802:1 122 799:Dione 746:Helene 742:trojan 710:Saturn 693:  688:· 686:  682:  677:· 675:  671:  666:· 664:  660:  642:Cronus 638:Titans 602:, and 596:Tethys 453:Albedo 396:0.212 379:1.4781 361:(1.834 344:(1.095 278:Saturn 238:0.0022 5000:Stars 4881:Titan 4870:Dione 4807:Pluto 4801:Ceres 4747:Earth 4740:Venus 4697:Stars 4447:Titan 4421:Dione 4384:Anthe 4373:Mimas 4362:Janus 4342:Atlas 4312:Moons 4302:Rings 4127:Mimas 4117:Vanth 4092:Dione 4087:Ariel 4027:Titan 3961:Varda 3917:Hiisi 3911:Lempo 3898:Queta 3848:Balam 3776:Aegis 3763:Remus 3711:Linus 3639:moons 3602:Pluto 3597:Orcus 3530:Earth 3182:Aegir 3093:Narvi 3078:Gridr 3044:Greip 3022:Skoll 2939:(100) 2752:Titan 2726:Dione 2693:Mimas 2669:Anthe 2641:Atlas 2625:Janus 2476:polar 1912:S2CID 1886:arXiv 1825:(PDF) 1814:(PDF) 1793:S2CID 1767:arXiv 1666:S2CID 1630:(PDF) 1520:S2CID 1438:S2CID 1123:probe 1090:Like 1080:Wolfe 1026:probe 961:Dorsa 872:Earth 782:Name 690: 679: 668: 648:Orbit 565:Dione 501:Dione 490:10.4 462:0.004 458:0.998 424:2.736 371:Mean 351:0.000 307:561.4 252:2.736 157:Diōnē 154:Διώνη 49:Dione 4944:Coma 4875:Rhea 4840:Moon 4821:Eris 4754:Mars 4440:Rhea 4188:List 4062:Rhea 4042:Moon 3924:Paha 3907:TNOs 3627:Eris 3535:Mars 3308:Ymir 3303:Loge 3263:Kari 3198:Gerd 3187:Beli 3114:Hati 2777:(12) 2745:Rhea 2511:and 2474:and 2349:2015 2254:2015 2228:2017 2193:2015 2075:2012 2019:ISSN 1860:2016 1833:2017 1818:NASA 1693:2013 1658:PMID 1586:ISBN 1559:2011 1531:2011 1512:PMID 1469:2013 1382:ISBN 1352:2007 1148:The 1098:and 1096:Moon 1078:and 1051:Rhea 1032:The 929:Rhea 876:Moon 762:and 748:and 726:jets 706:Moon 600:Rhea 587:Name 447:zero 353:0246 346:4868 339:Mass 4706:Sun 4332:Pan 4161:... 3815:Ida 3693:263 2886:(7) 2605:Pan 2426:at 2160:doi 2119:doi 2009:doi 1954:doi 1942:223 1904:doi 1785:doi 1763:345 1650:doi 1638:311 1582:279 1504:doi 1492:315 1428:doi 1416:164 1374:doi 567:in 426:915 398:m/s 330:776 327:964 254:915 224:396 222:377 5048:: 4845:Io 4555:) 4037:Io 3992:27 3935:25 3590:of 3523:of 2339:. 2269:. 2245:. 2158:. 2148:38 2146:. 2142:. 2117:. 2107:39 2105:. 2101:. 2083:^ 2066:. 2054:^ 2045:, 2017:. 2007:. 1997:45 1995:. 1991:. 1952:. 1940:. 1924:^ 1910:. 1902:. 1894:. 1882:43 1880:. 1868:^ 1850:. 1816:. 1791:. 1783:. 1775:. 1761:. 1749:^ 1728:, 1724:, 1664:. 1656:. 1648:. 1636:. 1632:. 1608:, 1584:. 1518:. 1510:. 1502:. 1490:. 1486:. 1436:. 1426:. 1414:. 1410:. 1396:^ 1380:. 1360:^ 1338:. 1327:^ 1281:. 1266:. 1259:. 1221:, 606:) 519:oʊ 513:aɪ 190:iː 178:aɪ 137:iː 131:oʊ 125:aɪ 4976:: 4681:e 4674:t 4667:v 4549:( 4247:e 4240:t 4233:v 3499:e 3492:t 3485:v 2551:e 2544:t 2537:v 2418:) 2410:( 2405:) 2374:) 2370:6 2367:( 2351:. 2325:. 2321:: 2299:. 2295:: 2256:. 2230:. 2195:. 2168:. 2162:: 2154:: 2127:. 2121:: 2113:: 2077:. 2025:. 2011:: 2003:: 1960:. 1956:: 1948:: 1918:. 1906:: 1898:: 1888:: 1862:. 1835:. 1799:. 1787:: 1779:: 1769:: 1709:. 1695:. 1672:. 1652:: 1644:: 1594:. 1561:. 1533:. 1506:: 1498:: 1471:. 1444:. 1430:: 1422:: 1390:. 1376:: 1354:. 1237:5 1235:L 1225:4 1223:L 1132:2 1127:O 898:2 766:5 764:L 759:4 757:L 528:/ 525:i 522:n 516:ˈ 510:d 507:/ 503:( 468:) 464:( 460:± 435:) 431:( 381:± 363:× 357:× 355:) 349:± 325:3 309:± 199:/ 196:n 193:ə 187:n 184:ˈ 181:ə 175:d 172:/ 140:/ 134:n 128:ˈ 122:d 119:/ 45:. 38:. 20:)

Index

Atmosphere of Dione
asteroid
106 Dione
Saturn C-4

Cassini
Discovered by
Giovanni Cassini
/dˈn/
Διώνη
Adjectives
/dəˈnən/
Orbital characteristics
Semi-major axis
Eccentricity
Orbital period (sidereal)
Inclination
Satellite of
Saturn
Dimensions
Mean radius
Surface area
Mass
density
Surface gravity
m/s
Escape velocity
Synodic rotation period
synchronous
Axial tilt

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